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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package javax.swing.plaf.basic;

import javax.swing.*;
import javax.swing.plaf.UIResource;

import java.awt.Graphics;
import java.awt.Color;
import java.awt.Component;
import java.awt.Polygon;
import java.io.Serializable;

Factory object that can vend Icons appropriate for the basic L & F.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package. Please see XMLEncoder. 
Author:
David Kloba, Georges Saab/**
 * Factory object that can vend Icons appropriate for the basic L & F.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author David Kloba
 * @author Georges Saab
 */
public class BasicIconFactory implements Serializable
{
    private static Icon frame_icon;
    private static Icon checkBoxIcon;
    private static Icon radioButtonIcon;
    private static Icon checkBoxMenuItemIcon;
    private static Icon radioButtonMenuItemIcon;
    private static Icon menuItemCheckIcon;
    private static Icon menuItemArrowIcon;
    private static Icon menuArrowIcon;

    public static Icon getMenuItemCheckIcon() {
        if (menuItemCheckIcon == null) {
            menuItemCheckIcon = new MenuItemCheckIcon();
        }
        return menuItemCheckIcon;
    }

    public static Icon getMenuItemArrowIcon() {
        if (menuItemArrowIcon == null) {
            menuItemArrowIcon = new MenuItemArrowIcon();
        }
        return menuItemArrowIcon;
    }

    public static Icon getMenuArrowIcon() {
        if (menuArrowIcon == null) {
            menuArrowIcon = new MenuArrowIcon();
        }
        return menuArrowIcon;
    }

    public static Icon getCheckBoxIcon() {
        if (checkBoxIcon == null) {
            checkBoxIcon = new CheckBoxIcon();
        }
        return checkBoxIcon;
    }

    public static Icon getRadioButtonIcon() {
        if (radioButtonIcon == null) {
            radioButtonIcon = new RadioButtonIcon();
        }
        return radioButtonIcon;
    }

    public static Icon getCheckBoxMenuItemIcon() {
        if (checkBoxMenuItemIcon == null) {
            checkBoxMenuItemIcon = new CheckBoxMenuItemIcon();
        }
        return checkBoxMenuItemIcon;
    }

    public static Icon getRadioButtonMenuItemIcon() {
        if (radioButtonMenuItemIcon == null) {
            radioButtonMenuItemIcon = new RadioButtonMenuItemIcon();
        }
        return radioButtonMenuItemIcon;
    }

    public static Icon createEmptyFrameIcon() {
        if(frame_icon == null)
            frame_icon = new EmptyFrameIcon();
        return frame_icon;
    }

    private static class EmptyFrameIcon implements Icon, Serializable {
        int height = 16;
        int width = 14;
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return width; }
        public int getIconHeight() { return height; }
    };

    private static class CheckBoxIcon implements Icon, Serializable
    {
        final static int csize = 13;
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }

        public int getIconWidth() {
            return csize;
        }

        public int getIconHeight() {
            return csize;
        }
    }

    private static class RadioButtonIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }

        public int getIconWidth() {
            return 13;
        }

        public int getIconHeight() {
            return 13;
        }
    } // end class RadioButtonIcon


    private static class CheckBoxMenuItemIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            AbstractButton b = (AbstractButton) c;
            ButtonModel model = b.getModel();
            boolean isSelected = model.isSelected();
            if (isSelected) {
                g.drawLine(x+7, y+1, x+7, y+3);
                g.drawLine(x+6, y+2, x+6, y+4);
                g.drawLine(x+5, y+3, x+5, y+5);
                g.drawLine(x+4, y+4, x+4, y+6);
                g.drawLine(x+3, y+5, x+3, y+7);
                g.drawLine(x+2, y+4, x+2, y+6);
                g.drawLine(x+1, y+3, x+1, y+5);
            }
        }
        public int getIconWidth() { return 9; }
        public int getIconHeight() { return 9; }

    } // End class CheckBoxMenuItemIcon


    private static class RadioButtonMenuItemIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            AbstractButton b = (AbstractButton) c;
            ButtonModel model = b.getModel();
            if (b.isSelected() == true) {
                g.fillOval(x+1, y+1, getIconWidth(), getIconHeight());
            }
        }
        public int getIconWidth() { return 6; }
        public int getIconHeight() { return 6; }

    } // End class RadioButtonMenuItemIcon


    private static class MenuItemCheckIcon implements Icon, UIResource, Serializable{
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return 9; }
        public int getIconHeight() { return 9; }

    } // End class MenuItemCheckIcon

    private static class MenuItemArrowIcon implements Icon, UIResource, Serializable {
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return 4; }
        public int getIconHeight() { return 8; }

    } // End class MenuItemArrowIcon

    private static class MenuArrowIcon implements Icon, UIResource, Serializable {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            Polygon p = new Polygon();
            p.addPoint(x, y);
            p.addPoint(x+getIconWidth(), y+getIconHeight()/2);
            p.addPoint(x, y+getIconHeight());
            g.fillPolygon(p);

        }
        public int getIconWidth() { return 4; }
        public int getIconHeight() { return 8; }
    } // End class MenuArrowIcon
}